84 M. C. Lea on New Combinations of 
“7170 substance gave °5247 picric acid. 
6622 6“ ee A877 “ & 
1°1459 ac “ "8452 4“ ‘cc 
6496 # * +1653 sal ammoniac. 
1:1459 ‘7 nae A PS ite 
6045 * +6289 chlorplatinate of ammonia. 
7321 n Be * 1 bOL i 
These.results lead to the formula :— 
sNH,3| Cd 0.C,. and; ! 0.| 
Pe Te ny Nes ney eee Pn ee ree 
Calculated. Found. 
Z 2 Mean. 
2(C,,H,N,0,,) 7867 73-44 72:86 73°31 73°20 
aNiy ee 824 810 817 793 8-07 
2Cd 1809 1794 *  TT94 
100-00 
? 
It seems however not improbable that this substance may be | 
a mixture in nearly equivalent quantities of the salts :— : 
NH,Cd0.C,, 3nd, (0 and 2NH,Cd0.C,, and, (°- 
for reasons similar to those mentioned in the case of the zine 
salt. | 
Ammonia-picrate of Chromium. 
This salt is easily obtained from an ammoniacal solution of — 
chromoxyd which may be prepared in the following manner: 
idded. A strongly alkaline beautiful pu 
obtained which may be preserved in pt 
